The htmlspecialchars function in PHP before 5.2.12 does not properly handle (1) overlong UTF-8 sequences, (2) invalid Shift_JIS sequences, and (3) invalid EUC-JP sequences, which allows remote attackers to conduct cross-site scripting (XSS) attacks by placing a crafted byte sequence before a special character.
CVE-2009-4142 is a security vulnerability that . Impacting 1 product from php organizations running these solutions should prioritize assessment and patching.
Originally identified in 2009, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.
2009-12-21T16:30:00.343
2025-04-09T00:30:58.490
Deferred
CVSSv2: 4.3 (MEDIUM)
AV:N/AC:M/Au:N/C:N/I:P/A:N
8.6
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | php | php | ≤ 5.2.11 | Yes |
| Application | php | php | 1.0 | Yes |
| Application | php | php | 2.0 | Yes |
| Application | php | php | 2.0b10 | Yes |
| Application | php | php | 3.0 | Yes |
| Application | php | php | 3.0.1 | Yes |
| Application | php | php | 3.0.2 | Yes |
| Application | php | php | 3.0.3 | Yes |
| Application | php | php | 3.0.4 | Yes |
| Application | php | php | 3.0.5 | Yes |
| Application | php | php | 3.0.6 | Yes |
| Application | php | php | 3.0.7 | Yes |
| Application | php | php | 3.0.8 | Yes |
| Application | php | php | 3.0.9 | Yes |
| Application | php | php | 3.0.10 | Yes |
| Application | php | php | 3.0.11 | Yes |
| Application | php | php | 3.0.12 | Yes |
| Application | php | php | 3.0.13 | Yes |
| Application | php | php | 3.0.14 | Yes |
| Application | php | php | 3.0.15 | Yes |
| Application | php | php | 3.0.16 | Yes |
| Application | php | php | 3.0.17 | Yes |
| Application | php | php | 3.0.18 | Yes |
| Application | php | php | 4 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0 | Yes |
| Application | php | php | 4.0.0 | Yes |
| Application | php | php | 4.0.1 | Yes |
| Application | php | php | 4.0.1 | Yes |
| Application | php | php | 4.0.1 | Yes |
| Application | php | php | 4.0.2 | Yes |
| Application | php | php | 4.0.3 | Yes |
| Application | php | php | 4.0.3 | Yes |
| Application | php | php | 4.0.4 | Yes |
| Application | php | php | 4.0.4 | Yes |
| Application | php | php | 4.0.5 | Yes |
| Application | php | php | 4.0.6 | Yes |
| Application | php | php | 4.0.7 | Yes |
| Application | php | php | 4.0.7 | Yes |
| Application | php | php | 4.0.7 | Yes |
| Application | php | php | 4.0.7 | Yes |
| Application | php | php | 4.0.7 | Yes |
| Application | php | php | 4.1.0 | Yes |
| Application | php | php | 4.1.1 | Yes |
| Application | php | php | 4.1.2 | Yes |
| Application | php | php | 4.2 | Yes |
| Application | php | php | 4.2.0 | Yes |
| Application | php | php | 4.2.1 | Yes |
| Application | php | php | 4.2.2 | Yes |
| Application | php | php | 4.2.3 | Yes |
| Application | php | php | 4.3.0 | Yes |
| Application | php | php | 4.3.1 | Yes |
| Application | php | php | 4.3.2 | Yes |
| Application | php | php | 4.3.3 | Yes |
| Application | php | php | 4.3.4 | Yes |
| Application | php | php | 4.3.5 | Yes |
| Application | php | php | 4.3.6 | Yes |
| Application | php | php | 4.3.7 | Yes |
| Application | php | php | 4.3.8 | Yes |
| Application | php | php | 4.3.9 | Yes |
| Application | php | php | 4.3.10 | Yes |
| Application | php | php | 4.3.11 | Yes |
| Application | php | php | 4.4.0 | Yes |
| Application | php | php | 4.4.1 | Yes |
| Application | php | php | 4.4.2 | Yes |
| Application | php | php | 4.4.3 | Yes |
| Application | php | php | 4.4.4 | Yes |
| Application | php | php | 4.4.5 | Yes |
| Application | php | php | 4.4.6 | Yes |
| Application | php | php | 4.4.7 | Yes |
| Application | php | php | 4.4.8 | Yes |
| Application | php | php | 4.4.9 | Yes |
| Application | php | php | 5 | Yes |
| Application | php | php | 5.0 | Yes |
| Application | php | php | 5.0 | Yes |
| Application | php | php | 5.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.0 | Yes |
| Application | php | php | 5.0.1 | Yes |
| Application | php | php | 5.0.2 | Yes |
| Application | php | php | 5.0.3 | Yes |
| Application | php | php | 5.0.4 | Yes |
| Application | php | php | 5.0.5 | Yes |
| Application | php | php | 5.1.0 | Yes |
| Application | php | php | 5.1.1 | Yes |
| Application | php | php | 5.1.3 | Yes |
| Application | php | php | 5.1.4 | Yes |
| Application | php | php | 5.1.5 | Yes |
| Application | php | php | 5.1.6 | Yes |
| Application | php | php | 5.2.0 | Yes |
| Application | php | php | 5.2.1 | Yes |
| Application | php | php | 5.2.2 | Yes |
| Application | php | php | 5.2.3 | Yes |
| Application | php | php | 5.2.4 | Yes |
| Application | php | php | 5.2.5 | Yes |
| Application | php | php | 5.2.6 | Yes |
| Application | php | php | 5.2.8 | Yes |
| Application | php | php | 5.2.9 | Yes |
| Application | php | php | 5.2.10 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For php's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.